From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: Dong Aisheng <dongas86@gmail.com>
Cc: Shawn Guo <shawnguo@kernel.org>,
Andrey Yurovsky <yurovsky@gmail.com>,
Lucas Stach <l.stach@pengutronix.de>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Fabio Estevam <fabio.estevam@nxp.com>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v7 1/2] dt-bindings: Add GPCv2 power gating driver
Date: Mon, 27 Mar 2017 11:42:51 -0700 [thread overview]
Message-ID: <CAHQ1cqH4HnVsiAT6wxVJ=b-AJKWCK6L7kTxLZ7JFrZ4B-t2PQg@mail.gmail.com> (raw)
In-Reply-To: <20170324063216.GC12604@b29396-OptiPlex-7040>
On Thu, Mar 23, 2017 at 11:32 PM, Dong Aisheng <dongas86@gmail.com> wrote:
> On Tue, Mar 21, 2017 at 07:50:03AM -0700, Andrey Smirnov wrote:
>> Add DT bindings for power domain driver for GPCv2 IP block found in
>> i.MX7 SoCs.
>>
>> Cc: yurovsky@gmail.com
>> Cc: Lucas Stach <l.stach@pengutronix.de>
>> Cc: Rob Herring <robh+dt@kernel.org>
>> Cc: Mark Rutland <mark.rutland@arm.com>
>> Cc: Fabio Estevam <fabio.estevam@nxp.com>
>> Cc: Dong Aisheng <dongas86@gmail.com>
>> Cc: devicetree@vger.kernel.org
>> Cc: linux-arm-kernel@lists.infradead.org
>> Cc: linux-kernel@vger.kernel.org
>> Acked-by: Rob Herring <robh@kernel.org>
>> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
>> ---
>> .../devicetree/bindings/power/fsl,imx-gpcv2.txt | 71 ++++++++++++++++++++++
>> include/dt-bindings/power/imx7-power.h | 18 ++++++
>> 2 files changed, 89 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/power/fsl,imx-gpcv2.txt
>> create mode 100644 include/dt-bindings/power/imx7-power.h
>>
>> diff --git a/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.txt b/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.txt
>> new file mode 100644
>> index 0000000..02f45c6
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.txt
>> @@ -0,0 +1,71 @@
>> +Freescale i.MX General Power Controller v2
>> +==========================================
>> +
>> +The i.MX7S/D General Power Control (GPC) block contains Power Gating
>> +Control (PGC) for various power domains.
>> +
>> +Required properties:
>> +
>> +- compatible: Should be "fsl,imx7d-gpc"
>> +
>> +- reg: should be register base and length as documented in the
>> + datasheet
>> +
>> +- interrupts: Should contain GPC interrupt request 1
>> +
>> +Power domains contained within GPC node are generic power domain
>> +providers, documented in
>> +Documentation/devicetree/bindings/power/power_domain.txt, which are
>> +described as subnodes of the power gating controller 'pgc' node,
>> +which, in turn, is expected to contain the following:
>> +
>> +Required properties:
>> +
>> +- reg: Power domain index. Valid values are defined in
>> + include/dt-bindings/power/imx7-power.h
>> +
>> +- #power-domain-cells: Should be 0
>> +
>> +Optional properties:
>> +
>> +- power-supply: Power supply used to power the domain
>> +
>> +Example:
>> +
>> + gpc: gpc@303a0000 {
>> + compatible = "fsl,imx7d-gpc";
>> + reg = <0x303a0000 0x1000>;
>> + interrupt-controller;
>> + interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
>> + #interrupt-cells = <3>;
>> + interrupt-parent = <&intc>;
>> +
>> + pgc {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + pgc_pcie_phy: power-domain@3 {
>> + #power-domain-cells = <0>;
>> +
>> + reg = <IMX7_POWER_DOMAIN_PCIE_PHY>;
>> + power-supply = <®_1p0d>;
>> + };
>> + };
>> + };
>> +
>> +
>> +Specifying power domain for IP modules
>> +======================================
>> +
>> +IP cores belonging to a power domain should contain a 'power-domains'
>> +property that is a phandle for PGC node representing the domain.
>> +
>> +Example of a device that is part of the PCIE_PHY power domain:
>> +
>> + pcie: pcie@33800000 {
>> + reg = <0x33800000 0x4000>,
>> + <0x4ff00000 0x80000>;
>> + /* ... */
>> + power-domains = <&pgc_pcie_phy>;
>> + /* ... */
>> + };
>> diff --git a/include/dt-bindings/power/imx7-power.h b/include/dt-bindings/power/imx7-power.h
>> new file mode 100644
>> index 0000000..eb70023
>> --- /dev/null
>> +++ b/include/dt-bindings/power/imx7-power.h
>> @@ -0,0 +1,18 @@
>> +/*
>> + * Copyright (C) 2017 Impinj
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> + * it under the terms of the GNU General Public License version 2 as
>> + * published by the Free Software Foundation.
>> + */
>> +
>> +#ifndef __DT_BINDINGS_IMX7_POWER_H__
>> +#define __DT_BINDINGS_IMX7_POWER_H__
>> +
>> +#define IMX7_POWER_DOMAIN_USB_HSIC_PHY 0
>> +#define IMX7_POWER_DOMAIN_USB_OTG2_PHY 1
>> +#define IMX7_POWER_DOMAIN_USB_OTG1_PHY 2
>> +#define IMX7_POWER_DOMAIN_PCIE_PHY 3
>> +#define IMX7_POWER_DOMAIN_MIPI_PHY 4
>
> Nitpick: Probably better to define according to the reference manual
> defined order.
>
> 0x800 ~ 0x83F : PGC for A7 core0
> 0x840 ~ 0x87F: PGC for A7 core1
> 0x880 ~ 0x8BF: PGC for A7 SCU
> 0xA00 ~ 0xA3F: PGC for fastmix/megamix
> 0xC00 ~ 0xC3F: PGC for MIPI PHY
> 0xC40 ~ 0xC7F: PGC for PCIE_PHY
> 0xC80 ~ 0xCBF: Reserved
> 0xCC0 ~ 0xCFF: Reserved
> 0xD00 ~ 0xD3F: PGC for USB HSIC PHY
>
> You can drop A7 core/scu/fastmix/megamix as well.
>
Sure, will do.
Thanks,
Andrey Smirnov
next prev parent reply other threads:[~2017-03-27 18:52 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-21 14:50 [PATCH v7 0/2] GPCv2 power gating driver Andrey Smirnov
2017-03-21 14:50 ` [PATCH v7 1/2] dt-bindings: Add " Andrey Smirnov
2017-03-24 6:32 ` Dong Aisheng
2017-03-27 18:42 ` Andrey Smirnov [this message]
2017-03-30 7:15 ` Dong Aisheng
2017-03-21 14:50 ` [PATCH v7 2/2] soc/imx: " Andrey Smirnov
2017-03-24 6:24 ` Dong Aisheng
2017-03-23 14:35 ` Lucas Stach
2017-03-30 7:51 ` Dong Aisheng
2017-03-29 16:08 ` Lucas Stach
2017-04-01 4:10 ` Dong Aisheng
2017-03-31 12:28 ` Lucas Stach
2017-04-11 3:22 ` Dong Aisheng
2017-03-27 18:42 ` Andrey Smirnov
2017-03-30 6:58 ` Dong Aisheng
2017-03-30 7:04 ` Dong Aisheng
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